Java(UtilClass)_Singleton_01

2024-11-06

 

 

su1 >>> 50
su2 >>> 133

 

package singleton;

public class Member {

	private static Member instance = null;
	
	//  외부에서 기본생성자를 직접적으로 접근하지 못하게 해야 함.
	private Member() {}		//  기본 생성자
	
	public static Member getInstance() {
		
		if(instance == null) {
			
			//  Member instance = new Member();
			instance = new Member();
		}
		return instance;
	}
}

Member

 

package singleton;

public class Member_01 {

	public static void main(String[] args) {
		
		//  Member 클래스 객체 생성
		//Member member1 = new Member();
		//Member member2 = new Member();
		//Member member3 = new Member();
		//Member member4 = new Member();
		//Member member5 = new Member();
		//Member member6 = new Member();
		//Member member7 = new Member();
		//Member member8 = new Member();
		//Member member9 = new Member();
		//Member member10 = new Member();
		
		Member member1 = Member.getInstance();
		Member member2 = Member.getInstance();
		Member member3 = Member.getInstance();
		Member member4 = Member.getInstance();
		Member member5 = Member.getInstance();
		Member member6 = Member.getInstance();
		Member member7 = Member.getInstance();
		Member member8 = Member.getInstance();
		Member member9 = Member.getInstance();
		Member member10 = Member.getInstance();
		
		System.out.println("member1 주소 >>> " + member1);
		System.out.println("member2 주소 >>> " + member2);
		System.out.println("member3 주소 >>> " + member3);
		System.out.println("member4 주소 >>> " + member4);
		System.out.println("member5 주소 >>> " + member5);
		System.out.println("member6 주소 >>> " + member6);
		System.out.println("member7 주소 >>> " + member7);
		System.out.println("member8 주소 >>> " + member8);
		System.out.println("member9 주소 >>> " + member9);
		System.out.println("member10 주소 >>> " + member10);
	}
}

Member_01